229+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our free frequency detector list covers 229+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 3.7★ (3) | Yes | No | Jul 2026 |
| 2 |  | Free | 5.0★ (1) | No | No | Jun 2026 |
| 3 |  | Free | 4.5★ (97) | No | Yes | Jul 2026 |
| 4 |  | Free | 4.7★ (156K) | No | Yes | Jul 2026 |
| 5 |  | Free | — | No | No | Jul 2026 |
| 6 |  | Free | 2.3★ (3) | No | Yes | Jul 2026 |
| 7 |  | Free | 4.4★ (238) | No | Yes | Jul 2026 |
| 8 |  | Free | 4.5★ (3.5K) | Yes | No | Jul 2026 |
This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.
Instantly discover the tuning frequency of music around you. This app uses song recognition and advanced analysis to reveal if a track is tuned to standard concert pitch or other frequencies, offering a new dimension to your listening experience.
Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.
This app transforms your device into a professional sound level meter, precisely measuring ambient noise pressure. It offers advanced features like frequency analysis, historical data management, and dosimeter functions, making it useful for various applications and entertainment.
This application transforms your device into a precise sound analysis tool. It offers real-time frequency detection, visualization, and data logging for musicians, engineers, and curious individuals. Gain clarity and accuracy in understanding the soundscape around you.
Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.
Scan and analyze all devices connected to your local network. This essential tool helps protect your privacy by identifying everything on your network. Regular updates ensure an improved user experience.
Scan your current network for suspicious devices and identify hidden cameras or bugs using advanced AI and Wi-Fi scanning. Protect your privacy in hotels, public spaces, and more by ensuring your environment is safe.
Visualize sound waves in real-time by detecting and displaying their frequencies in Hertz. Experience an augmented reality view of the audio environment around you.
Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.
Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.
Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.
Monitor your surroundings with this decibel meter app. It measures sound levels in real-time, providing clear visual analysis and advanced filtering options. Easily share your readings for documentation or further analysis.
This application offers real-time radio frequency signal detection and analysis. It monitors signal strength, analyzes frequency bands, and identifies interference sources. The tool provides historical data and network optimization insights for a better wireless experience.
Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.
Protect your privacy by scanning for hidden spy cameras in various locations. This app also functions as a network scanner to detect spy devices, GPS trackers, and more. Stay safe and secure in hotels, bathrooms, and other important places.
Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.
Transform your device into a professional sound level meter and audio analyzer. Measure ambient noise, monitor decibel levels, and visualize sound frequencies in real time. It also offers advanced sleep tracking with sound recognition to identify disruptions.
Detect paranormal activity using multiple scanning frequencies, including EVP, EMF, and video. Explore your surroundings by listening for unusual sounds or asking questions to the other side. This app is designed for entertainment and novelty.